22 ASIA

(c) The rainfall of Ceylon brought by the 'north-east

monsoon ' which has crossed the Bay of Bengal.

(d) The rainfall of the East Indies, lying in the Equatorial

belt.

(e) The rainfall of certain east-coast: tracts due to oceanic

influences affecting the normal character of the winter
winds.

Conditions in Summer. As the summer months approach,
the land heats rapidly, and not only is the great high-pressure

&^'\-'-'-':^f.

FIG. x5.~—Winter rainfall and winds In A$f&.
The Isohyets shown are 10, 30 and 60 Incfce» for the talf-year November »t to April goth.
system of winter completely dissipated, but it is actually replaced
by a succession of low-pressure areas, Again, the influence of
the mountain barriers is paramount. A sea-level isobar map
shows a low-pressure area stretching from Arabia over Balu-
chistan, North-western India and Tibet. Actually there is no
connection between the intense low-pressure centre which develops
over the plains of North-western India and those which develop
over the plateaus of the continental interior. The heating of the"